Bernard Shaw wrote the play during an important moment in history, which was when women were starting to gain independence in the beginning of the 20th century. It is produced in 1914 which is when WW1 broke out and war time made it easier for women to find work, and soon after women got their independent vote in 1920. Thus Pygmalion has a strong sense of feminism and independence as one of the leading themes to guide the characters on, especially Eliza.
Eliza throughout the play is striving to prove how women should be independent and not rely on men in order to lead a life. Both movie and play shows us that when Higgins turns Eliza into a duchess, he didnt give her just class and status but he took her independence away because she is not fit to sell anything else. What happens now is that if Eliza doesnt marry she has no one to provide for her and Freddy is useless because he has no talent for making money. Thus Higgins indirectly limited Elizas opportunities making her dependent on men. And during the movie when she goes back to Higgins she loses power in her character. Even though it was of her own free will and not on necessity, she still loses the power she had before.
Pygmalion comes from a Greek Myth, Ovids narrative where a man called Pygmalion makes a sculpture of a woman called Galatea. Ovids original idea is that Galatea would